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Firefox 57 Unbranded does not allow legacy extensions

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Gingerbread Man

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Joined: January 30th, 2007, 10:55 am

Post Posted January 9th, 2018, 10:50 pm

Using an unbranded build of version 58, you can set extensions.legacy.enabled to true in about:config. This will enable legacy add-ons, but legacy APIs are constantly being removed, so your particular legacy add-ons may not function.

morat
 
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Joined: February 3rd, 2009, 6:29 pm

Post Posted January 30th, 2018, 8:05 am

marty60 wrote:Is this working for you anymore?

Dumby's hack broke in Fx 59.

A CB user got a few legacy extensions working in Fx 59 by taking the defaults\preferences\*.js files in *.xpi files and placing these *.js files into the folder with the channel-prefs.js file.

I got the Custom Buttons 0.0.5.8.9 fixed7pre and DOM Inspector Plus 2.0.17.1.2rc extensions working without Dumby's hack in Fx 58. I put the CB and DOMi Plus pref files into the folder with the channel-prefs.js file. I rather not use Dumby's hack in Fx 58 because it increases the startup time noticeably.

I set these preferences.

Code: Select all
// Disable Signing Requirement
// Enable Legacy Extensions
// Enable Non Multiprocess Compatible Extensions

pref("xpinstall.signatures.required", false);
pref("extensions.legacy.enabled", true);
pref("extensions.allow-non-mpc-extensions", true);

therube

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Post Posted January 30th, 2018, 10:56 am

Disabling e10s may affect what you might or might not get out of legacy extension...
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Gingerbread Man

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Post Posted January 30th, 2018, 11:49 pm

morat wrote:Custom Buttons 0.0.5.8.9 fixed7pre

Buttons that can't be added by webextensions can be added by userChrome.js scripts. No noticeable impact on startup time that I've seen.

Frank Lion

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Post Posted January 31st, 2018, 5:51 pm

therube wrote:Disabling e10s may affect what you might or might not get out of legacy extension...

...and also - extensions.allow-non-mpc-extensions > true
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